Find out the missing no. in the series..

Find the next no. of the following series:
(i) 3,10,101,?
(ii) 1,2,4,9,28,?
(iii) 24,60,120,210,?

Answer: 
(i) 3,10,101,10202
(ii) 1,2,4,9,28,125
(iii) 24,60,120,210,336

Explanation: 
(i) 3, (3*3+1), (10*10+1), (101*101=1)..
(ii) (0!+0), (1!+1), (2!+2), (3!+3), (4!+4), (5!+5)..
(iii) (3^3-3), (4^3-4), (5^3-5), (6^3-6)..